Title:
Rock drill
United States Patent 2673071


Inventors:
Curtis, John C.
Rice, Edward A.
Application Number:
US67519846A
Publication Date:
03/23/1954
Filing Date:
06/07/1946
Assignee:
JOY MFG CO
Primary Class:
Other Classes:
24/129R, 173/29, 173/147, 294/92
International Classes:
E21B19/06; E21B19/084
View Patent Images:
US Patent References:
2365749Rock drill1944-12-26
2338625Rock drill1944-01-04
2035156Drill puller1936-03-24
1921341Attachment for rock drill tools1933-08-08
1851599Puller for working implements1932-03-29
1551214Pipe grab1925-08-25